Update {virtual,override,final} to follow C++11 style.

android_webview/native/permission/simple_permission_request.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ANDROID_WEBVIEW_NATIVE_PERMISSION_SIMPLE_PERMISSION_REQUEST_H
 #define ANDROID_WEBVIEW_NATIVE_PERMISSION_SIMPLE_PERMISSION_REQUEST_H
 
 #include "android_webview/native/permission/aw_permission_request_delegate.h"
 #include "base/callback.h"
 
 namespace android_webview {
 
 // The class is used to handle the simple permission request which just needs
 // a callback with bool parameter to indicate the permission granted or not.
 class SimplePermissionRequest : public AwPermissionRequestDelegate {
  public:
   SimplePermissionRequest(const GURL& origin,
                           int64 resources,
                           const base::Callback<void(bool)>& callback);
-  virtual ~SimplePermissionRequest();
+  ~SimplePermissionRequest() override;
 
   // AwPermissionRequestDelegate implementation.
-  virtual const GURL& GetOrigin() override;
-  virtual int64 GetResources() override;
-  virtual void NotifyRequestResult(bool allowed) override;
+  const GURL& GetOrigin() override;
+  int64 GetResources() override;
+  void NotifyRequestResult(bool allowed) override;
 
  private:
   const GURL origin_;
   int64 resources_;
   const base::Callback<void(bool)> callback_;
 
   DISALLOW_COPY_AND_ASSIGN(SimplePermissionRequest);
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_NATIVE_PERMISSION_PROTECTED_MEDIA_ID_PERMISSION_REQUEST_H